package com.car.model;

import java.util.ArrayList;
import java.util.List;

/**
 * 汽车电子系统类 - 汽车的电子控制中心
 * 与Car类是组合关系，包含多个ElectronicControlUnit组件
 */
public class ElectronicSystem {
    private List<ElectronicControlUnit> ecuList; // ECU列表 - 组合关系
    private String systemVersion; // 系统版本
    
    /**
     * 构造方法
     * @param systemVersion 系统版本
     */
    public ElectronicSystem(String systemVersion) {
        this.systemVersion = systemVersion;
        this.ecuList = new ArrayList<>();
        
        // 初始化基本的ECU组件
        initializeECUs();
    }
    
    /**
     * 初始化基础ECU组件
     */
    private void initializeECUs() {
        addECU(new ElectronicControlUnit("Engine ECU", "Controls engine performance"));
        addECU(new ElectronicControlUnit("ABS ECU", "Controls anti-lock braking system"));
        addECU(new ElectronicControlUnit("Body ECU", "Controls body functions"));
        addECU(new ElectronicControlUnit("Transmission ECU", "Controls transmission shifting"));
    }
    
    /**
     * 添加ECU到系统
     * @param ecu 电子控制单元
     */
    public void addECU(ElectronicControlUnit ecu) {
        ecuList.add(ecu);
    }
    
    /**
     * 替换指定的ECU
     * @param index ECU索引
     * @param newEcu 新的ECU
     * @return 是否替换成功
     */
    public boolean replaceECU(int index, ElectronicControlUnit newEcu) {
        if (index >= 0 && index < ecuList.size()) {
            ecuList.set(index, newEcu);
            return true;
        }
        return false;
    }
    
    /**
     * 系统诊断 - 检查所有ECU状态
     * @return 所有ECU的诊断结果
     */
    public boolean runDiagnostics() {
        boolean allOperational = true;
        for (ElectronicControlUnit ecu : ecuList) {
            if (!ecu.diagnose()) {
                System.out.println(ecu.getName() + " is not operational!");
                allOperational = false;
            }
        }
        return allOperational;
    }
    
    // getter and setter methods
    public List<ElectronicControlUnit> getEcuList() {
        return new ArrayList<>(ecuList); // 返回副本，保持封装性
    }
    
    public String getSystemVersion() {
        return systemVersion;
    }
    
    public void setSystemVersion(String systemVersion) {
        this.systemVersion = systemVersion;
    }
    
    @Override
    public String toString() {
        return "ElectronicSystem [systemVersion=" + systemVersion + ", ecuCount=" + ecuList.size() + "]";
    }
}